Online Test of Chapter 15 Our Environment MCQ Class 10th Science

Questions :-

1.The radiation, highly damaging to organisms is
a)UV
b)Infrared radiation
c)Ultrasonic
d)None of these

2. Every step of food chain is called a
a)Producers
b)Consumers
c)Secondary consumers
d)None of these

3. Green plants convert …. % of solar energy into food energy.
a)10
b)0.1
c)5
d)1

4. The process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.
a)Concentration
b)Bio magnification
c)Expansion
d)Pollution

5. Flow of energy in an ecosystem is always
a)Unidirectional
b)Bidirectional
c)Multi directional
d)No specific direction

6.Ozone layer is getting depleted at the higher levels of the atmosphere due to effect of
a)Cfcs
b)Raising temperature
c)Compost
d)None of these

7. The decomposers operating in our ecosystem
a)Virus
b)Bacteria
c)Fungi
d)Both (b) and (c)

8.The waste we generate may be biodegradable or non-biodegradable
a)Chemo degradable
b)Biodegradable
c)Only (a)
d)Conservation

9. Measure of biodiversity of an area is the
a)Number of species found there
b)Range of different life forms
c)Both (a) and (b)
d)Only (a)

10.Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute
a)Ecological pyramid
b)Food web
c)Ecosystem
d)Food chain